Elementary Plane Trigonometry, That Is, Plane Trigonometry Without Imaginaries
The book Elementary Plane Trigonometry, That Is, Plane Trigonometry Without Imaginaries was written by author Nixon, Randal Charles John Here you can read free online of Elementary Plane Trigonometry, That Is, Plane Trigonometry Without Imaginaries book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Elementary Plane Trigonometry, That Is, Plane Trigonometry Without Imaginaries a good or bad book?
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b 2 - a 2 1 - tan (9 , „ „ (1) + (2) gives _^_ = __^ = tan (45 - 0) ^ - to rives ° 2 ~ b2 - 2sin ^ + ^ sin( /> t (2) - (i) gives -—^ _ = tan x> say Now tan 2 U + 6 -) - tan 2 6 - = -JL n (» + g)jm»_ V *' 2 oos 2 f cos 2 (> + £) = tan x tan - see 2 ($ + -\ : tan 2 ( + £) |, _ tan x tan £j = tan 1 jtan f + tan x | ••• ten 2 (* + £)- tan £ tan (f + x ) , , (0 ,c 2 - b 2 i = tan - tan 1-+ tan- 1 ^94 Trigonometry — Chapter XVI Exercises 1. A surveyor has a Gunter's chain, and a logarithmic table-boo...k, but no instrument for measuring angles : show how he can find the distance of an inaccessible object in his own horizontal plane. 2 . At each of two points A, B, on the bank of a river, the join of two points P, Q, on the opposite bank (all four being in the same horizontal plane) subtends the same angle OC ; also the angles QAB, PBA are respectively /3, y ', and QBA is greater than PBA : prove that PQ/AB = sin a/sin (OC + (3 + y) and = {sin (OC + (3) sin (OC + y) — sin /3 sin y}/sin 2 (OC + /3 + y) /.
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